linux-kernel - [PATCH] mm/vmalloc.c: use rb_entry

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Date:   Tue, 20 Dec 2016 21:57:43 +0800
From:   Geliang Tang <geliangtang@...il.com>
To:     Andrew Morton <akpm@...ux-foundation.org>,
        zijun_hu <zijun_hu@....com>,
        David Rientjes <rientjes@...gle.com>,
        Michal Hocko <mhocko@...e.com>,
        Vladimir Davydov <vdavydov.dev@...il.com>,
        Chris Wilson <chris@...is-wilson.co.uk>
Cc:     Geliang Tang <geliangtang@...il.com>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] mm/vmalloc.c: use rb_entry_safe

Use rb_entry_safe() instead of open-coding it.

Signed-off-by: Geliang Tang <geliangtang@...il.com>
---
 mm/vmalloc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index a558438..b9999fc 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -2309,7 +2309,7 @@ EXPORT_SYMBOL_GPL(free_vm_area);
 #ifdef CONFIG_SMP
 static struct vmap_area *node_to_va(struct rb_node *n)
 {
-	return n ? rb_entry(n, struct vmap_area, rb_node) : NULL;
+	return rb_entry_safe(n, struct vmap_area, rb_node);
 }
 
 /**
-- 
2.9.3